Clean up NetBSD libc Minix port.

This patch add the proper .if/.else/.endif to the Makefiles, add places I forgot #ifdef __minix and remove newlines.

lib/nbsd_libc/include/env.h

@@ -56,7 +56,11 @@ __writelockenv(void)
 }
 
 static __inline bool
+#ifdef __minix
 __unlockenv(void)
+#else /* Bug-to-bug compatibility? */
+__unlocklockenv(void)
+#endif
 {
 	return true;
 }

lib/nbsd_libc/include/namespace.h

@@ -4,7 +4,7 @@
  * Copyright (c) 1997-2004 The NetBSD Foundation, Inc.
  * All rights reserved.
  *
- * Redistribution and use in source and binary forms, ith or without
+ * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright